Malicious PDF — malware analysis report

Static analysis result for SHA-256 6664becad2564150…

MALICIOUS

PDF

44.1 KB Created: 2020-08-11 19:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b3f415341fd7bc470883b0a6fdb102 SHA-1: f90782b6d450a9304addde991322a7276222997b SHA-256: 6664becad25641502d9efe8a780ebdf5bb62939a13cd7e8b87cc0e550781b665
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and embedded links suggest a tactic of overwhelming the user with links, likely to lead them to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=baptism+of+the+holy+spirit+verses+pdf
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/2/6/132681938/wovaxale.pdf
    • http://files.soundsystemnetwork.com/uploads/1/3/1/4/131408172/wakimesumunusomi.pdf
    • http://lorunasa.kellygillespie.org/uploads/1/3/0/7/130738848/3366059.pdf
    • http://files.pfoa.com/uploads/1/3/1/3/131380213/jubukegeximixujegafo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/define_psychotherapy.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/nuxurinaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/37137120309.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/analisis_bioclimatico.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/minimalismo_existencial.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0423/files/23919946941.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/cito_begrijpend_lezen_groep_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/10020473272.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/7752192625.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/advanced_mathematical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/college_algebra_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/zewaxezedawutut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/vimimuxizemutun.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fc8.bin
afec769e2b85f5e8446a68e83bd992b421bca3014b668897a6c12a1be50cc82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC8 5492 bytes
font_01_sfnt_off00008258.bin
be71d02b075145680f72eee9be292676becccb0b826270984a89a1a1fe0cffac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8258 9788 bytes

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